Rotary shock absorber for power driven vehicles



July 24, 1934. H

H. wRNER Filed May 9, 1932 Patented July 24, 1934 UNITED STATES PATENT or-'FlcE ROTARY SHgCK ABSORBER RIVEN VEHICLE SFOR POWER Application 1 Claim.

This invention relates to rotary shock absorbers in which shocks and counter shocks acting in the direction of rotation and originating, for example, 'in the driving engine are taken up and 5 equalized by two concentric rings which can be resiliently rotated relative to one another. The advantageof the present improvement over the known devices consists in that the helical springs employed for equalizing the shocks are mounted in a special, secure and permanent manner. In

this way the constant rubbing of the springs during their operation and the consequences of the considerable centrifugal forces acting on the springs at the same time are eiectively met.

The accompanying drawing illustrates the invention in combination with a two-part clutch disc in. the form which is used in clutches for power driven vehicles.

Fig. 1 shows a cross-section on the line A of Fig. 2, and

u Fig. 2 is an elevation partly in longitudinal sec- The clutch disc consists in a known manner oi the nave 1 with annular ange 2, to which is secured on each side an annular disc 3, for example by riveting. In this way a deep annular groove 4 is formed in which the clutch disc 6, which is riveted to a lining ring 5 (partly visible in Fig. 1 but not shown in Fig. 2), is rotatable.

This disc, as well as the discs 3, is provided with recesses '7 which coincide and in which the helical springs 8 are placed. The rotary shocks which are to belabsorbed have the eilect of turning the discs 3 and the clutch disc 6 in opposite directions so that the springs 8 are tensioned. The

shocks are damped by these and the following return movement of the parts 3 and 6.

The present invention consists in the construc- V tion and mounting of the bearing plates 9 against 40 which the ends of the helical springs 8 bear. The

-plates 9 lie in pairsparallel to the side edges in the recesses'lot thedisc3andthediscs5, 6. In

May 9, 1932, serial No. 510,180 Germany February 24, 1931 the middle of the plates 9, a short support l10 of sleeve-like construction is bent up, and on the upper and lowerv sides tongues 11 and 12 are cut out by means of which the plates 9 engage in the annular groove 4 and are prevented from turning. 00 The outwardly directed tongues 12 are bent double and the recesses 12 at the corresponding sides are shaped to suit these bent parts. The angle a between a diameter and the adjoining side of the recess is therefore greater than 90. In the re- 85 cesses 7 the helical springs 8 areplaced between each two supporting plates 9 and their end turns embrace tightly the supports 10. By this mode of arrangement the rubbing of the ends of the springs on the bearing surfaces during the operation of the shock absorber is prevented, and, in particular,` on account of the size of the angle a the result is obtained that during the relative* movement of the discs 3 and 5, 6 and the alternate lifting fromthe bearing plates 9 no friction can 75 occur between the plates and the adjacent edges of the recesses, which, in View of the considerable centrifugal forces acting there, would lead to rapid wear of the rubbing surfaces.

What I claim is:

A rotary shock absorber for power-driven vehicles comprising a hub, two parallel discs secured thereto, a concentric annular plate disposed in the groove formed by the two discs and rotatable ,relative thereto, the plate and discs each having g5 a number oi' recesses arranged in a circle opposite one another, shock absorbing springs mounted in the recesses, bearingplates arranged in pairs in the recesses of the discs, sleeve-like abutments in the middle ot the bearing plates which are closely surrounded by the end turns of the springs, and tongues cut out of the bearing plates on the inside and the outside, the `outer tongues being bent in an angle of more than 90 between a diameter and the adioiningside of a recess.

msnmrcn WRNER.

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